Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). porterage. Retrieved September 24, 2026, from http://smartdefine.org/porterage/definitions/2047660 |
| Chicago | Webster's. 2011. "porterage" http://smartdefine.org/porterage/definitions/2047660 (accessed September 24, 2026). |
| Harvard | Webster's 2011, porterage, Smart Define, viewed 24 September, 2026, <http://smartdefine.org/porterage/definitions/2047660>. |
| MLA | Webster's. "porterage" 27 May 2011. Web. 24 September 2026. <http://smartdefine.org/porterage/definitions/2047660> |